Carbureter.



G. V. & W. L. SHEPARD.

CARBURETER.

APPLICATION FILED OCT. I7. 1916.

Patented NOV. 26, 1918.

INVENTORS.

ATTORNEY.

WITNESSES:

NITE STATES GEORGE V.'"SHEPARD AND WILBUR L. SHEPARD, OF WEST HARTFORD, CONNECTICUT.

GARBURETER.

Specification of Letters Patent.

Patented Nov. 26, 1918.

7 Application filed October 17, 1916. Serial No. 126,105.

To all whom it may concern.-

Be it known that we, GEORGE V. SHEPARD and WILBUR L. SHEPARD, each a citizen of the United States, and a resident of West Hartford, in the county of Hartford and State of Connecticut, have invented a new and Improved Carbureter, of which the following is a specification.

Our invention relates to the class of devices employed in connection with gas engines for mlxing the air with the fluld fuel from which the gaseous mixture is produced, and an object of. our invention, among others, is to provide a device of this class that shall be particularly efiicient in its operation and shall produce mixtures suitable to a wide variety of conditions,

and in such manner as to economize the use of fuel.

One form of device embodying our invention and in the construction and use of which the objects herein set out, as well as others, may be attained, is illustrated in the accompanying drawings, in which- Figure 1 is a view in central vertical section through a carburetor embodying our invention.

Fig. 2 is a view in section through the same on plane denoted by dotted line 22 of Fig. 1.

In the accompanying drawings the numeral 5 indicates the shell or bowl of our improved carbureter that may be constructed of any suitable material and of any desired shape, that shown herein being round in cross section. This bowl has an extension 6 containing an inlet recess 7 with which an in shown as of the needle type, is mounted for longitudinal reciprocating movement in the extension 6, this valve being supported by a float lever 10 pivotally mounte in the extension and having at the end opposite the valve :1 float 11 located within the bowl. Fluid passages 12 extend from the lower end of the chamber in the bowl into a chamber 13 from which a passage to a drain cock 14 extends. A cap 15 is secured to the top of the bowl or shell and has an inwardly projectin tube 16 screw threaded into the bottom 0% the bowl and having apassage com municating with the chamber 13. All of the parts thus far described ma be of any well known construction and urther and detailed description is, therefore, omitted herein. A valve casing 17 is mounted on -movement in the valve chamber and is op- -eratively connected with the valve lever as by means of interengaging teeth as shown in Fig. 1 of the drawings. Air passages extend through the valve from an air inlet 23 at one end of the valve casing. As shown herein there are two annular chambers 24,

one at each end of the valve and they are joined by passages 37 located on opposite sides of a' web 25 within the valve and through which a fuel passage 26 extends, communicatin with the passage through the tube 16, this fuel passage being enlarged as at 27. The annular chambers 24: are in fact formed by tubular extensions 28.29 projecting in opposite directions from the web 25, the extension 28 having a passage 30 communicating with the passage 26 and preferably of a size somewhat larger than said passage 26. A port 31 extends from the passage 30 out at the end of the valve, flow of fuel through this port being controlled as by a' needle valve 32, one end of which is screw threaded into the extension 29. The position of this valve may be changed as by an adjusting piece 33 having one edge notched to correspond with the notched end of the extension 29. This adjustin piece has a recess, preferably of angular orm to correspond with the angular shaped head 3% of the valve, and a spring 35 in the recess 1n the ad usting piece holds said piece with the notches thereon yieldingly engaging the notches in the head of said projection. A slight pull outwardly on the knurled flange of this ad usting piece will disengage said notches and allow the adjusting piece and the valve to be turned to the position desired. Upon the release of force on the adusting piece the spring will force it inward and cause said notches to reengage and hold the adjusting piece and valve in this position.

This valve is-of peculiar advantage in that the fuel and air supplied to the carbureting chamber may be automatically controlled the relative amounts may be varied to almost any degree The valve lever will be connected at any suitable point a manually operated device, a it will be noted that by moving the upper end of the valve lever 21, as seen in Fig. 1 to the left the valve will be moved to the right and 1e amount of air flowing to the carbureting chamber will be gradually lessened as the valve approaches its seat and will be shut off When the valve r 4 its seat and vvith the leverin the position shovvn by the clotted line at the left of the lever in Fig. 1. This movement of the valve Will pass the enlargement or mouth 27 of passage all across the passage through the tube 16 and thus gradually shut ofi the tovvarcl the right from the point illustrat in 1 to the point elenotecl by the dotted line at t e right the leven the mouth of the fuel passage Wlll be gradually closecl While the supply of air into the carbureting chamber will be gradually increased in proportion to the amount of fuel until a point is reachecl at Which the fuel Will be entirely shut ancl a large amount of air in proportion to the amount of fuel Will be admitted.

The engine may therefore the use of this single valve, be supplied with air inch or the same valve may be usetl to change the proportions betvveen the air .5. fuel by gradually lessening the amount of fuel anal at the same time Without elem ing supplyof ir which is a operation of our i "in 4J1 1.1 .l $8 13.! "man we apparell L L L 3 c-onsicer 5O represent the as i v? Q 7 but We :lesire to it under 1o 2:.

ape us shcvvn is oilli invention be car ".ouretermclu 1 v chamber ancl el ch," communicating said structure h V s 1 3c the val e chamber, a v

valve chamber a Dassa S 1. 1:)

surrounding saitl central fuel means for operating the valve simultaneously effect the opening of the passage from the fuel chamber and that to the carbureting chambers.

2. A carbureter including a fuel chamber and a carbureting chamber the fuel chamher having a passage for flow o fuel therefrom, a valve having passage register with that from fuel chamben and also having passages for ilovv of air, and means for moving the valve in. one direction to simultaneously decrease and shut the flow of fuel ancl air and to move it in the oppo site direction to gradually increase the amount of allow of air as compared vvith that of fuel While decreasing the amount of flow of the lattera 3. A carbureter having a fuel chamber therein. and a valve chamber arr: nthe fuel chamber with a passage between saicl chambers, ancl a carbureting chamber communicating with said valve chamber, a passage for flow of fuel from the fuel chamber to the valve chambeiz a valve located in the valve chamber antl having a passage positioned register with that from the fuel chamber when valve is in ail-intermediate position saitl va 1 passages for llovv of to the carbureting chamber, and means for moving the valve in opposite directions from the point in Which its passage registers with that from the fuel chamber and to close the passages for fiovv of fuel air in its extreme movement in one direction,

a; carbureter a fuel chamber. a valve chamber ancl a carhureting chamber with a communicating passag between the 'therein, the latter opening at the enrl of the valve valve also having air passages extending length ise thereitu s taperecl to fit the tapered encl o i close passages therein said valve seat surrounding; the mouth the central lengthwise for opera? 6. A carbureter including a shell, a cap to close said shell, a valve casing located on the cap, said cap and casing having a pas-' sage communicating with a fuel chamber in theshell, a valve located in the valve casing and movable across the mouth of the passage from the fuel chamber, said valve having an air passage extending lengthwise therethrough and terminating in an annular passage, said valve also having a fuelpassage adapted to register with the passage from the fuel chamber, the mouth of said fuel passage in the valve being located within the circle formed by said annular chamber, a valve seat of tapered form adapted to receive the tapered end of the valve, and means for operating said valve.

7. A carbureter including a shell having a fuel chamber with a passage therefrom, a valve casing located above said shell and having an opening to the atmosphere at one end with a tapered valve seat at the mouth of the opening from the other end of the valve casing, a valve movable in said casing and having an annular air passage at opposite ends, and a fuel passage extending centrally therethrough, the annular passage at the inner end of the valve surrounding the outlet from the fuel passage through thevalve, and means for operating the valve.

8. A carbureter including a shell having a fuel chamber, a cap closing said chamber and having anextension screw threaded into the bottom of said fuel chamber and with a passage through said extension, a valve casing formed integrally with the cap on the top thereof, said casing having a valve chamber communicating with the opening municate with that from the fuel chamber,

said valve also having a passage for air, a valve extending through the mam valve to control the flow of fuel therethrough, means for adjusting the position of the valve within the main valve, and means for operating the main valve. 1

10. A carbureter including a shell having a fuel chamber with a passage therethrough, amain valve having a centrally arranged fuel passage to communicate with that from the fuel chamber, a valve located in the main valve to close the outlet from the central passage therein, said main valve having a. passage for flow of air, a cap loosely connected with the valve in the main valve and having longitudinal movement thereon but securedto rotate with the valve in the main valve, interengaging connections between said main valve and cap to hold the latter in predetermined positions with respect to the main valve, and means for operating the main valve.

GEORGE V. SHEPARD. WILBUR'L. SHEPARD. 

